Read and analyze each word problem and give what is/are required. Write the detailed solution If possible, express your final answer in the form u(t)= Rcos(@t - 8). 3. A spring is stretched 1.5" by a...

You can use methods such as variation of parameters, application of exponential shift theorem, and evaluation of some inverse differential operators.

Extracted text: Read and analyze each word problem and give what is/are required. Write the detailed solution If possible, express your final answer in the form u(t)= Rcos(@t - 8). 3. A spring is stretched 1.5" by a 2-lb weight. Let the weight be pushed up 3" above equilibrium and the released. Describe the motion.